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Table 1 Inorganic and organic compositions of limonite from Aso Mountain.

From: Effect of Aso limonite on anaerobic digestion of waste sewage sludge

CompositionsPercentage % (g/kg)CompositionsPercentage % (g/kg)
Iron—Fe2O36.908Ash7.480
Silica—SiO21.370
Aluminium—Al2O30.276Water1.380
Calcium—CaO0.149
Sulphur—S0.058Carbohydrate1.060
Magnesium—MgO0.051
Potassium—K0.020Protein0.060
Phosphorus—P0.009
Manganese—Mn0.003Fat0.010
Sodium—Na0.002